Name: Period: Date: Review questions for exam 2 Define h Define sister chromatid
ID: 271187 • Letter: N
Question
Name: Period: Date: Review questions for exam 2 Define h Define sister chromatids. Describe 2 parts of meiosis that are similar to mitosis. Identify whether each process below occurs during mitosis, meiosis, or both aSister chromatids separate b Haploid cells are formed . Cell division occurs once 4 haploid cells are the final result t Crossing over occurs e Cell division occurs twice h Replicated chromosomes line up in the middle of the cell i2 diploid cells are the final result Define crossing over What phase does it occur? s. Does the parent cell in Mitosis start off as diploid or haploid? Are the resulting cells at the end of Mitosis diploid or haploid? 6 Does the parent cell in Meiosis start off as diploid or haploidi? Are the resulting cells at the end of Meiosis diploid or haploid? 7. How does the number of chromosomes in a sex cell compare with the number of chromosomes in the parent cell?Explanation / Answer
A pair of Homologous chromosomes consists one from mother and one father. Both of them have same genes at same loci, however, they may have different alleles.
Sister chromatids are two identical copies of a chromosome, of which one is formed by the replication of the other. Both copies are joined together by centromere.
2. separation of chromosomes and cytokinesis are similar in both meiosis and mitosis. Infact, the whole meiosis II is almost similar to mitosis.
3. sister chromatids separate- both
Haploid cells are formed- meiosis
Cell division occurs once- mitosis
Homologous chromosomes pair- both
4 haploid cells are the final result- meiosis
Crossing over occurs- both (but significant in meiosis)
Cell division occurs twice- meiosis
Replicated chromosomes line up in the middle of the cell- both
2 diploid cells are the final result- mitosis
4. crossing over is a process in cell division where different segments are exchanged between non sister chromatids in a pair of homologous chromosomes after pairing. The point at which the exchange happens is called synapse.
It occurs in pachytene stage of prophase I in meiosis I.
5. parent cells in mitosis start off as diploid cells.
Resulting cells at the end of mitosis- diploid
6. Parent cells in meiosis start off as diploid.
Resulting cells at the end of meiosis- haploid
7. number of chromosomes in a sex cell is half the number in its parent cell.
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